Kante has been out since picking up a hamstring injury during the international break earlier this month.
The 26-year-old returned to training before last Sunday's Bournemouth game but did not play, and has now travelled to the Italian capital.
"Kante has trained with us," said Conte. "It's very important in this moment to speak with the player, and his sensation is very important.
"I was a player and I know very well after an injury, above all a muscular problem, a bad injury, it's very important to listen to the player, to find out his sensation and then make the best decision for him and the team.
"For sure tomorrow we will try to make the best decision."
Conte said he was expecting "another very tough match" in their Group C rematch two weeks after a 3-3 draw in London.
"It was an exciting game despite being a 3-3 draw it was proof of the desire of both teams to go for it. Tomorrow will be another difficult match," said Conte as Chelsea lead Group C, two points ahead of Roma, with Atletico Madrid in third.
"Our group is a tough group with Atletico Madrid and Roma, two really group teams. To stay at the top of this group is really important," said the Italian.
"Roma are in a good moment of form. It's important for us to overcome this difficult period. We are recovering important players."